Joint



y 1940- I w. G. o. STIEBER 2,206,373

JOINT Filnd June 10, 1936 Fig.7 i 6 Jr: mm for Uilbelm gusiqu 01in ,JZicE'er- Patented 'July 2,'

PATENT OFFICE JOINT- Wilhelm Gustav om seem; Korntal, near Stuttgart,Germany Application June 10.19%, Serial No. sam- In Germany JunelS, 1935l Claims-h (cl. 237-58) I The present invention relates to a method andmeans for making rigid yet disconnectable connections, particularly forrigidly yet disconnectably connecting machine parts of round crosssectional configuration suchas shafts, tubes, and the like or parts ofany configuration to such elements. a

An object of the present invention resides in the provision of aconnection' of the type described having high frictional engagingpressure and requiring only little effort for connecting anddisconnecting.

Another object of the present invention is to provide a disconnectablecoupling for shafts, which transmits the whole torque from one shaft tothe connected shaft by frictional engagement and which has no keys,bolts or like definite connecting members and which does not requirespecial and costly machining of the ends of the shafts.

A further object of this invention resides in the provision of adisconnectable connection of machine elements of circular crosssectional configuration, which assures exact centering of the connectedparts.

Another object of this invention resides in the provision of aconnection for reliably securing discs, wheels, levers, and the like toshafts,-axles or rods, for reliably connecting the individual parts of abuilt up crank shaft, particularly for tightly connecting tube ends andmany other elements used for engineering purposes.

According to the present invention, a clamping means is used fordisconnectably yet rigidly and reliably connecting a plurality ofmembers, which members are provided with cone-shaped parts which are ofmale nature in one half of said members and of female nature in theother half of said members and which fit into one another. In betweentwo corresponding cone-shaped parts, rolling means are provided; inaddition, means are provided for pushing the coneshaped parts into oneanother.

Further and other objects of the, Present invention will be hereinafterset forth in the accompanying specification and claims and shown in thedrawing which, by way of illustration, shows what I now consider to be apreferred embodiment of my invention.

In the drawing:

Fig. 1 is a part cross sectional showing of a connection according tothe present invention.

Fig. 2 is a part cross sectional showing of a modification of aconnection according to the present invention.

Fig.3 is a part cross sectional showing of another modification of aconnection according to the present invention. 7 Fig. 4 is a part crosssectional showing of another application of the present invention.

Like parts are designated by like numerals in allfigures of the drawing.

Referring more particularly to Fig. l of the drawing: cylindrical part Icarries hollow part 2 which snugly fits over part I; instead of pro-'viding a cylindrical surface, the connection between parts i and 2 maybe of conical configuration or a thread or tooth connection may be used..Hollow part 2 carries an annular part 3, part of the exterior surfaceof which is coneshaped. The hollow body 2 and the annular part 3 areeach provided with a plurality of axial slots 8 and I, respectively. Theparts left in between the slots are, therefore, slightly resilient.

Adjacent to the cone-shaped part3, rolls 4 are provided which are heldin place by means ofa cage 5. Cage 5 is, shown in section in the upperpart of Fig. 1. r

Rolls 4 are inclined towards the center line of the system and are alsoinclined with respect to the longitudinal axis of the system, the latterinclination amounting to anangle a; in other words, rolls 4 are settwisted with respect to the central axis of the system. Rolls 4 are heldin the described position by means of cage 5. One or more rolls may bearranged in one clearance of cage 5. In the drawing, one roll is shownin one clearance for simplicitys sake. A socket 6 having a coneshapedinterior is arranged around the annular member or ring 3 and the rolls4. The inclination of the coneshaped interior of socket 6 conforms withthe inclination of the cone-shaped part of member 3 and the rolls 4.Rolls 4 may be made cylindrical or cone-shaped. For simplicitys sake,they are shown cylindrical in the drawing. With cylindrical rolls, thecone-shaped surfaces of parts 3 and G'must be made parallel.

If socket 6 is revolved. rolls I exert a screwaction. Socket 6 is thenalso moved axially towards part 3 andexerts a pressure in radialdirection. This pressure increases upon revolv- This.

ingly high becauseof the rolling principle used and because the rolls 4may be arranged on the whole circumference. 1

Due to the'pressure between parts I and 2, a highly eifective hightension connection is created. The proportion of the locking torque tothe power transmission torque can be determined within wide limits byproper choice of .the inclination of the cone surfaces and of the anglea.

Socket 6 may be held in place and prevented from turning, as well withrespect to part I as to part 2, by any well known' and conventionalfastening means which are not shown in the drawing because they do notform part of the present invention.

Socket 5 and part 3 may also be screwed into one another,-the thread ofsuch screw having approximately the pitch necessitated by theinclination of the rolls; A falling,apa'rt of the individual members is,thereby, prevented when disassembling the system.

If a disc or wheel or the like must be connected to part I, the hollowbody 2 must be made part of said disc or wheel. bodies, for instance,the ends of rod-like parts, must be connected, body 2 is constructed asa bushing which is pushed over the'ends of the rods to be connected andthe clamp consisting of members 3, 4, 5, and 6 is applied at both endsof said bushing.

When omitting slots I, hollow body 2 is pressed so much towards part Iithat these. two parts sit completely tight on one} another. Theconnection as described can, therefore, be used for all purposes where acompletely tight connection is required, for example, for connectingtubes operating at great internal liquid or gas pressure.

In many cases, parts 2 and 2 may be constructed as one body.

Fig. 2 shows a modification of the present invention in which pressureis exerted from the interior towards the outer parts. 60 is a coneshapedrotundbody which is revolved and airially moved for generating -thedesired-pressure. The arrangement of rolls 4 and cage I is fundamentallythe same as in Fig. 1; The pressure acts on ring 30 which has acone-shaped interior surface and acts through ring 3| on hollow body toFig.3 of the drawing, part of the clamping means, namely, the partdesignated by numeral 3 in Fig. 1 is formed bythe part which correspondstopart 2 in Fig. 1. Instead of rolls 4, balls 9 are used. For holdingthe rolls in place, the cone-shaped part 3' of part 2' and also theinterior surface of socket 6' are provided with one or a plurality ofgrooves I2 and I! which are arranged in screw-like vmanner.

Instead of providing such grooves, socket 6' may be screwed on to cone3' or other means may be provided foneffecting axial movement of part,6' with respect to part 2'. This principle is used in the embodiment ofmy invention which is illustrated in Fig. 4. The interior cone 6|corresponds to the cone 6| in Fig. 2.

The hollow body 2" has a cone-shaped interior surface. Part II is to befastened to body 2f. A ring II is screwed into bodyl" and adapted tomove cone 60' into body 2 Balls 9 are provided in between the surface ofcone I and the If two cylindrical cone-shaped interior surface of part2". ,Instead of creating the connecting pressure by screw action, cone60' may be forced into part 2", for example, by. means of a hydraulicpress and held in position by the ring ll.

- The mechanism. consisting of parts 3, 4, 5, and 5 shown in Fig. 1 orthe mechanism comprising parts 60, 4, 5, and 30 shown in Fig. 2 may alsobe advantageously used as an adjustable measuring gauge for measuringinterior or outside diameters.- The expansible part 3 or 3|! forms themeasuring member of such a device, whereas the other parts serve asadjusting members and members 6 or 60 as indicating member the extent ofmovement of which indicates the difference of the diameter of member 2and the inside diameter of part 3 6r the outside diameter of part 30.The parts 3, 4, 5, 6 or G0, 4, 5, 30 may be modified according toFigures 3 and 4 of the drawing.

While I believe the above described embodiments of my invention to bepreferred embodiments,-I wish it to be understood that I do not desireto be limited to the exact details of method, design, and constructionshown and described, for obvious modifications will occur to a personskilled in the art.

What I claim is: I

1. Clamping means for disconnectably pressing together two members, eachof which is provided with a gliding surface, said gliding sur-- facesbeing adapted to glidingly cooperate with one another, said clampingmeans comprising a part having a cone-shaped surface and being adaptedto permanently glidingly cooperate with .other part also having acone-shaped surface which is adjacent to said rollers and which isadapted to permanently force said rollers on to the cone-shaped surfaceof said first mentioned part upon axial movement of said parts withrespect to one another.

2. Coupling means for disconnectably coupling togethena plurality ofmembers having adjacent gliding surfaces, said coupling means comprisinga cone part adapted to cooperate with one of said members, another conepart adapted tocooperate with said first mentioned cone part, rollingmeans located in between said cooperating cone parts, and means forforcing said last mentioned cone part on to said first mentioned conepart, where by said last mentionedcone part presses said: rolling meansto said first mentioned cone part,

and said first mentioned cone part presses the member with which itcooperates to another of said members, and a reliable connection of saidpressed together members is obtained.

3. Joint means for tightly and disconnectably joining tube ends whichare located within one another, said means comprising'an annular memberwhich is situated around the outer of said tube ends and which has acone-shaped exterior surface, a socket situated around said'annularmember and having an interior coneshaped surface, and rolling meanslocated between said cone-shaped surfaces, whereby, upon.

tightly pressed on to the interior tube.

1i: outer-tube i3 p 4. Joint meem for htiy and disconnectably joiningtube ends which are-located within one another, said mwns comprising anannular member which is situated around the outer of said tube ends andwhich has a cone-shaped exterior surface, a socket situated around saidannular member and I! an interior cone= shaped surface, rolling mlocated between said cone-shaped surfaces, and means for pushing saidsocket into and over said annular member, whereby, upon anal movementtowards and into one another of said socket and said annu= lar member,said annular member is pressed on to the end of the outer tube. and theend of said h on to the interior ascents which are ially displaceablewith respect to said first mentioned cone part, and axially andcircumferentially displaceable rolling means permanently located inbetween said cone parts, whereby, upon axial displacement of said coneparts with respect to one another, said other cone pert presses saidrolling means to said first mentioned cone part, and said firstmentioned cone part presses the member to which it is adjacent toanother of said members, and a reliable cotion of said pressed togethermembers is obtained.

within one another and have adjacent gliding surfaces, said couplingmeans comprising

